Sinead O'Connor, who had recently been announced as a surprise guest at Marlay Park this Friday alongside blues legend Don Baker, has just announced on Twitter that she will now not be performing.

The Friday show - the first of three gigs which are set to rock Marlay Park in south Dublin - is headlined by one of Ireland's great musicians Van Morrison, with the Welsh crooner Tom Jones in support.

Sinead released her latest album How About I Be Me and You Be You earlier this year to widespread acclaim.